<template>
  <div class="roles">
    <!--面包屑导航区域-->
    <el-breadcrumb separator="/">
      <el-breadcrumb-item :to="{ path: '/' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item><a href="/">权限管理</a></el-breadcrumb-item>
      <el-breadcrumb-item>用户列表</el-breadcrumb-item>
    </el-breadcrumb>
    <!--卡片视图-->
    <el-card>
      <!--添加角色按钮-->
      <el-row>
        <el-col>
          <el-button type="primary">添加角色</el-button>
        </el-col>
      </el-row>
      <!-- 角色列表区域 -->
      <el-table :data="rolelist" border stripe>
        <!-- 展开列 -->
        <el-table-column type="expand">
          <template slot-scope="scope">
            <el-row :class="['bdbottom', index ===0 ? 'bdtop' : '','vcenter']" v-for="(item,index) in scope.row.children" :key="item.id">
              <!-- 渲染一级权限 -->
              <el-col :span="5">
                <el-tag :closable="true" @close="removeRightById(scope.row, item.id)">{{item.authName}}</el-tag>
                <i class="el-icon-caret-right"></i>
              </el-col>
              <!-- 渲染二级和三级权限 -->
              <el-col :span="19">
                <!-- 通过for循环 嵌套渲染二级权限 -->
                <el-row :class="[iindex ===0 ? '' : 'bdtop', 'vcenter']" v-for="(iitem, iindex) in item.children" :key="iitem.id">
                  <el-col :span="6">
                    <el-tag type="success" :closable="true" @close="removeRightById(scope.row, iitem.id)">
                      {{iitem.authName}}
                    </el-tag>
                    <i class="el-icon-caret-right"></i>
                  </el-col>
                  <el-col :span="13">
                    <el-tag type="warning" v-for="(iiitem) in iitem.children" :key="iiitem.id" :closable="true" @close="removeRightById(scope.row, iiitem.id)">{{iiitem.authName}}
                    </el-tag>
                  </el-col>
                </el-row>
              </el-col>
            </el-row>
          </template>
        </el-table-column>
        <!-- 索引列 -->
        <el-table-column type="index" label="#"></el-table-column>
        <el-table-column label="角色名称" prop="rolename"></el-table-column>
        <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
        <el-table-column label="操作">
          <template slot-scope="scope">
            <el-button size="mini" type="primary" icon="el-icon-search">编辑</el-button>
            <el-button size="mini" type="danger" icon="el-icon-search">删除</el-button>
            <el-button size="mini" type="warning" icon="el-icon-search" @click="showSetRightDialog(scope.row)">分配权限</el-button>
          </template>
        </el-table-column>
      </el-table>
    </el-card>
    <!--分配权限的对话框-->showSetRightDialog
    <el-dialog title="分配权限" :visible.sync="setRightDialogVisible" width="50%">
      <!--树形控件-->
      <el-tree :data="rightslist" :props="treeProps" @node-click="handleNodeClick" show-checkbox node-key="id" :default-expand-all ="true" :default-checked-keys="defKeys"></el-tree>
      <span slot="footer" class="dialog-footer">
    <el-button @click="dialogVisible = false">取 消</el-button>
    <el-button type="primary" @click="dialogVisible = false">确 定</el-button>
  </span>
    </el-dialog>
  </div>
</template>
<script>
  export default {
    data() {
      return {
        //所有角色列表数据
        rolelist: [],
        //控制分配权限对话框的显示与隐藏
        setRightDialogVisible: false,
        rightslist:[],
        //树形控件的属性绑定
        treeProps:{
          children: 'children',
          label: 'authName'
        },
        //默认选中的节点
        defKeys:[]
      }
    },
    methods: {
      async getRolesList() {
        const {data: res} = await this.$http.get('roles')
        if (res.meta.status !== 200) {
          return this.$message.error('获取角色列表失败');
        }
        this.rolelist = res.data
        console.log(this.rolelist)
      },
      async removeRightById(roleInfo, id) {
        // 弹窗用户是否删除
        const confirmResult = await this.$confirm('是否继续删除?', '提示', {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
        }).catch(err => err)
        if (confirmResult !== 'confirm') {
          return this.$message.info('取消了删除')
        }
        const {data: res} = await this.$http.delete(`roles/${roleInfo.id}/rights/${id}`)
        if (res.meta.status !== 200) {
          return this.$message.error('删除失败')
        }
        this.$message.success('删除成功')
        roleInfo.children = res.data
      },
      //展示分配权限的对话框
      async showSetRightDialog(role) {
        //获取所有权限数据
        const {data:res}=await this.$http.get('rights/tree')
        if(res.meta.status !==200){
         return this.$message.error('获取权限失败')
        }
        //把获取到的权限数据保存到data中
        this.rightslist=res.data
        console.log(this.rightslist)
        //获取三级节点的ID
        this.getLeafKeys(role, this.defKeys)
        this.setRightDialogVisible = true
      },
      //通过递归的形式，获取角色下所有三级权限的id，并保存到defKes中
      getLeafKeys(node, arr){
        //如果当前node节点不包括children属性，则是三级节点
        if(!node.children){
          return arr.push(node.id)
        }
        node.children.forEach(item=>{
          this.getLeafKeys(item, arr)
        })
      },
      handleNodeClick(){

      }
    },
    created() {
      this.getRolesList()
    }
  }
</script>
<style lang="scss" scoped>
  .bdtop {
    border-top: 1px solid #eeeeee;
  }

  .bdbottom {
    border-bottom: 1px solid #eeeeee;
  }

  .el-tag {
    margin: 7px;
  }

  .vcenter {
    display: flex;
    align-items: center;
  }
</style>
